Diaphragm force-pump.



PATENTED MAY 31,1904.l

No. r$1,591.

- G. HV. LANGILL.

DIAPHRAGM FORGE PUMP.

APPLICATION FILED DBO. 26, 1901.

4 SEBTS-SHE'ET 2.

Nok MODEL,

V/il ESSES.

pHoro-mmc.. WASHINGTON. u. c.

' HNO. v61,591.

l 'PATENTBD MA Y31, 1.904. C. H. LANGILL. DIAPHRAGM FORCE PUMP.

APPLICATION FILED DEO. 26, 1901.

V 4 SHEETS-SHEET 4.

N0 .MODELl No.i 7e1,59'1. l VUNITED STATES Patented May 31, 1904. 'i

CHABLES H. LANGTLL, OE BOSTON, MASSACHUSETTS, ASSTGNOB To BOSTON ANB LOCHBOBT BLOCH Co., OE BOSTON, MASSACHUSETTS', A COEBOBATTON OE NEW YORK. Y

DlAPHRAGMFoRoEPuMP.

SPECIFICATION forming* part of Letters Patent NO. 761,591, dated May 3l., i904.

Application iledgDeeember 26, 1901. y Serial No. 87,354. (No model.)`

To all whom, it mag/concern:

Be it known `th at I, CHARLES H. LANGTLL, of

Boston, in thecounty of Suffolk and State of Massachusetts, `have invented certain new and useful Improvements .in Diaphragm Force- Pumps, Vof which the following `is a speciication. l

rl`hisinvention relates to .-improvements in dia hragm force-)um s .and has for its obe l l) v n `jects to( produce a very powerful, effective,

easily-operated, andconvenient pump which will deliver the water or other liquid `being pumped at each movement of theoperating `handle or lever, thus causing a steady and substantially unbroken flow of such liquid from the outlet or delivery opening of the pump, and to otherwise improve the pump, as will be. understood by the complete description thereof. i y

The invention Consists of' twopump-chambers, ,an inletr and outlet .opening Common to both chambers,qand inlet and outletpassages i' from said inlet and outlet openings to said pump-chambers, with a suitable check-valve between said inlet andeach pump-chamber and lbetween each pump-chamber and said outlet., a flexible diaphragmfor each pumpchamber, a yoke` coupling said diaphragms.

together,.so that their movements will be di-A rectly opposite .to` eachother, and an operating handle. or lever to valternately force each diaphragm into its pump-chamber and withdraw .it therefrom.

. The invention further consists in minor de: tails of construction, arrangements, and combinations of parts, as willzbe -fully described hereinafter, and set forth in claims hereunto annexed.

. The invention is carriedout substantially as illustrated on `the accompanying drawings, which form an essential part of this specification, and whereon like characters of reference refer 'to like parts wherever they occur on the drawings.

On the drawings, Figure 1 represents a planf view of my improved pump. Fig. 2 represents a sectional side elevation of thepump looking at the outlet of the pump. -Fig 3 represents a sectional side elevation of the pump looking at the inlet of the pump. Figs. 4 and 5 represent, respectively, cross-sections of the pump on the lines 4 4; and 5 5,- shown in Fig. 3. Fig. 6 represents a central longitudinal section of the pump th rough both pump- Chambers and looking toward the inlet side of the pump. Fig. 7 represents a central longitudinal section of the pump through both pump-chambers and looking toward the outlet side of the pump. Figs. 8 and 9 represent enlarged detail horizontal. sections of one of the pump-chambers, the diaphragm therefor, and the attachments to thediaphragm which causes it` .to move into and from said chamber,

the diaphragm being shown, respectively, at its inner and outer positions on said views and showing the peculiar shape of the diaphragm, whereby its movement is very easy and the resistance thereto is reduced.

The pump consists of a casing, preferably made .in one piece or casting and having the pump-chambers A and a, one of which is arranged at each end of said casing, substantially as shown. The casing of the pump is provided on one side with the inlet B and on the opposite side with the outlet C. Apassage D within the casing of the pump is in open communication with'the inlet anduextends in bothdirections toward the fp'nmpchambers. The` opposite' ends of'this passage communicate with the .passages E and e,

"'trol'le'd by the'lrespective check-valves F and f, which allow of the flow of water from the passage D into thepassages E and e, but prevent the return of said water to the passage D. The passages E and e are in .open communication with therespective pump-chambers A and a. A passages D and .E form an inlet-passage from the inlet B to the pum p-ch'ambenA, which is controlled by the check-valve F'preventing the iow of water from the pump-chamber to the inlet B. It will also be seen that the pas- It willfthus be seen that-they sages D and form an inlet-passage from the inlet B to the pump-chamber (t, which passage is controlled by the check-valve f preventing the flow of water from the pumpchamber to the inlet. The passages E and e are in communication with a passage Gr, which extends ina parallel direction to the passage D, the communication between the passages E and e and the passage G being' controlled by the respective eheckvalves H and L, which allow the free flow of water from the passages E and e into the passage G, but prevent the return of the water to the passages E and e. The passage G is in open communication with the outlet C of the pump. As the passages E and e are in open communication with the respective pump-chambers A and a, it will be seen that the passages E and G form an outlet-passage from the pumpchamber A to the outlet C, which outlet-passage is controlled by the check-valve H preventing the return of water from the outlet to the pump-chamber; also that the passages e and G form an outlet-passage from the pumpchamber a to the outlet C, which outlet-passage is controlled by the check-valve /t preventing the return of water from the outlet to the pump-chamber.

The pump-chambers A"and a are provided with the respective flexible diaphragms I and f, which form the outer walls of said chambers. These diaphragms are of a peculiar shape, as hereinafter described, whereby they are given a rolling movement and prevented from cramping, thus increasing the ease with which they may be operated. A yoke J embraces the casing of the pump and reciprocates longitudinally on said easing in the direction of a line passing through the centers of both pump-chambers, so that the ends of the yoke will move toward and from said pump-chambers. This yoke is guided in its movements by means of the studs K and 7': on the casing and the slotsjandjin the yoke. A lever L, pivotally attached at Z to the casing of the pump, passes through a slotted perforation 7" in the yoke, and said lever is preferably'provided with an antifriction-roll l, which engages the sides of the slotted perforation to prevent friction between said lever and yoke when said lever is operated to move said yoke, as hereinafter described. rIhe upper end of the lever L is provided with one or more sockets for the reception of one or more handles LC On the drawings I have illustrated the lever L as being provided with two handles L, by which said lever may be rocked on its fulcrum Zwhen operating the pump, as hereinafter described.

The-ends of the yoke J are secured to the center-of the respective diaphragms I and e' by the respective bolts M and m, said ends of the yoke being located upon said bolts between two nuts 1W M and m m/ on said bolts, the inner ends of said bolts passing through perforations in their respective diaphragms and being provided with the cup-shaped heads or washers N a inside said diaphragms and within the pump-chambers, which cup-shaped heads or washers Vform followers to support the diaphragms during their movements when the pump is operated, as will be understood by the complete description of the pump.

Upon the bolts M and fm, between the diaphragms I and i and the nuts M and m' are placed the respective sleeve-washers O and o, the inner ends of which are provided with the cup-shaped heads or washers lJ and p, resting against the outside of the diaphragms and forming followers to support the diaphragms during their movements when the pump is being operated.

From the above description of the device it will be seen that when the lever L is rocked upon its fulcrum it will cause the reciprocation of the yokeJ upon its guides on the pumpcasing and that the reciprocation of the yoke through connections with the diaphragms will cause the alternate forcing of the diaphragms into and the withdrawal of the diaphragms from the respective pump-chambers A and a, the diaphragm attached to one end of the yoke being forced into its pump-chamber, while the diaphragm attached to the other end of the yoke is withdrawn from its pump-chamber, or vice versa. It will also be seen that this alternate forcing of the diaphragms into and withdrawal from their pump-chambers will cause the alternate filling of the pump-chambers through the inlet-passages therefor and the discharging of the contents of said pumpchambers through the outlet-passages therefor; also that the check-valves in said passages will prevent the return of the water through said passages. By this alternate operation of the diaphragms at opposite ends of the pumpcasing it will be seen that substantially a continuous flow of water will be maintained without employment of an air-chamber.

In order to prevent the accumulation of sand gravel, or other materials in the lower part of the pump-chambers near the diaphragms, which would be liable to cut or-v otherwise wear or destroy the diaphragms, I prefer to cutl away a portion of the wall of the pump-chainbers between the pump-chambers and the respective passages E and a, substantially as shown at Q, and q, thereby forming a free passage between the lower portions of the pump-chambers and said passages, which will be substantially on a level with the lower portions of the pump-chambers, and consequently there will be no pockets formed in the lower portions of the pump-chambers to'eollect the sand and gravel which may enter the pump with the water being pumped.

In order to inspect, insert, or to renew the valves F, f, H, and la., l provide the easingof the pump with the respective caps or plugs F', f', H', and h, which are easily removed from said casing, and. when removed they leave the Valves exposed. y

On the drawings thecheck-,valves have been shown as being ball-valves, which in many respects is the preferred form in which to use said valves; but it will be understood that any common form of puppet or iiat-clapper Valves f the pump-chambers and valve-seats, in a sin-- From the above description of this construcf tion of my improved pump it will be seen that the same is very simple in construction, is very effective in operation, and being formed with the inlet and outlet passages, as well as gle casting can be made at a very slight expense, as there is but avery slight amount of finishing to be performed upon the rough v casting of the casing of the pump.

Heretofore in diaphragm-pumps the diaphragm has been so shaped that it formed a truss in itself and when moved from an inner to an outer position, or vice versa, as when pumping water, has to be upset or cramped in order to be able to overcome the truss which it forms in itself and to pass its central position in moving in either direction. It consequently requires the expenditure of considerable force to move the diaphragm from one end of its stroke to the other end even when no water is being pumped. It is one of the principal objects of my present invention to -overcome this loss of power in moving the diaphragmf'and this I accomplish by the pey; culiar shape of the diaphragms, whereby they are givena rolling or swinging movement n upon themselves when-making their inward y and outward movements.

- l The outer rims of the diaphragms are clamped to the outer edges of the pump-chambers bymeans of the respective rings R and r and the screws or "bolts S and s, which act to hold the rims of the diaphragms firmly between said parts. The normal position and shape of each diaphragm is that which it occupies when withdrawn from its pump-chamber to its outer position and is substantially-that illustrated by a sectional view in .Fig 9. In this position the portion l0 of the diaphragm which is just inside the rim clamped by the ring R is bent inward toward the pump-chamber, as shown in said Fig. 9. The next inside part 11 of the diaphragm is curved toward the outside of the pump-chamber and continues until it meets the main curved portion 12 of the diaphragm.

By this construction of the diaphragm it will be seen that when pressure is applied to thev center of the diaphragm, tending to force the diaphragm into the pump-chamber, its outer.

portion 10 will yield, and therefore allow-the portion 11 to turn or roll gradually upon itself, causing the curve of the curved portion 10 to gradually move toward the center of the diaphragm, assuming the position of said parts as shown on Fig. 8 and until the diaphragm has reached its central position, when a further and complete inward movementwill cause the diaphragm to assume substantially the shape illustrated in'Fig. 8 and with the parts 10, 11, and 12 substantially as shown. The reverse movement ofthe diaphragm will cause substantially the same action on the various portions thereof and until the diaphragm reaches the position shown in Fig. 9. By this movement of the parts ofthe diaphragm it will be seen that very slight power will be required to operate it as compared with the diaphragm now iny common use. Having thus fully descrlbed the nature, construction, and operatlon of my inventlon, I

-wish to secure by Letters Patent and claim- 1. A flexible diaphragm for a diaphragmy IOO chambers A and a, at opposite ends of the v pump, the cross-passages E and e each communicating with said pump-chambers, the inlet B, the longitudinal passage D in open communication with said inlet, the valves F and f controlling communication between the passage D and the respective passages E and e, the discharge C, the longitudlnal passage G in open communication with said discharge,

IIO l and the valves H and L controlling communication between the respective passages E and c and the longitudinal passage G, combined with the flexible diaphragms I and t' on the respective pump-chambers A and a, the yoke .I connecting said diaphragms, the lever L and its yhandles L passing through a perforation in said yoke and pivoted to the pump, and the antifriction-roll Z within perforation in said yoke.

In testimony whereof I have aiiixed my signature in presence of two witnesses.

CHARLES H. LANGILL.

Witnesses: y

HENRY CI-IADBOURN, S. G. RoLLINs, J r. 

